Events Calendar

Seminar in Astronautical Engineering

Speaker: Dr. C.C. "George" Chao, Retired Senior Engineer Specialist/Technical Manager, JPL; Consultant, Aerospace Corporation; Part-Time Lecturer

Talk Title: Stationkeeping Strategies for a Single GEO Satellite & Strategies for Collocating Multiple Geostationary Satellites

Abstract: Topic 1: Stationkeeping Strategies for a Single GEO Satellite

The dynamics and perturbations of a geostationary orbit will be introduced. The longitude (East/West) and inclination (North/South) stationkeeping strategies will be discussed. The Sun-pointing strategy and its relation to solar radiation pressure effect on eccentricity will be understood.


Topic 2: Strategies for Collocating Multiple Geostationary Satellites

The ITU (International Telecommunication Union) policies and the need for GEO collocation will be discussed. Some basic strategies for collocating 2 to 3 GEO satellites will be introduced. The concept of eccentricity and inclination vector separation will be understood with examples. The final portion of the talk will be devoted to the formation and control of a cluster of many GEO satellites in a special geometry called the “Halo” formation. The advanced method of formation-keeping using onboard GPS measurements and GEO satellite disposal policies will be discussed.

Host: Department of Astronautical Engineering

More Information: ASTE Seminar (Dr. Chao) 10.5.pdf

Location: Olin Hall of Engineering (OHE) - 122

Audiences: Everyone Is Invited

Contact: Marrietta Penoliar